Safety attachment for moving picture machines



lM. J. Pr-:K I 1,834,106y

SAFETY ATTACHMENT FOR MOVING PICTUE MACHINES Dec. 1, 1931.

Filed June `ll, 1930 2 Sheets-Sheet l J- /l v 2/ 72 as 42 22 O) 25 24 e5 j? ne, )o 4 Z/Oa' I E 27 56 5028 TI 5f T Dec. l, 1931. lM. J. PECK SAFETY-ATTACHMENT FOR MOVING PICTUR MACHINES 2 Sheets-Sheet Filed June ll, 1930 Iportion of the film in Patented Dec. 1, 1931:

SAFETY ATTACHMENT FOB MOVING PICTURE MACHINES Application led June 11,

This invention relates to moving picture mechanism and analogous means utilizing a combustible film, and particularly pertains to kautomatically operating safety devices in connection with the emergency, Iare instantly or simultaneously and automatically brought into operation to sever that portion of the film exterior of theV magazines and prevent firing of the portions of the lm contained within the magazines.

The invention further contemplates the provision of automatically operating safety devices in connection with the magazines of moving picture mechanism whereby the film is severed in the event-of firing of the port1on thereof which extends between the maga-1 y the film which run between the magazines, orl

aub

which feed from one to the other, together with the safety devices embodying the features of the invention, the feeding devices eing shown set for operation.

Fig. 2 is -a sectional view of a portion of one of the magazines and one of the safety device organizations in connection therewith, the parts of the safety device organization being shownreleased.

Fig. 3 is a top plan view of areciprocating film severing in horizontal section and devices cooperating with the plate illustrated in dotted lines.

ig. 4 is an secti'on through interlocking leversand an inflammable loop or tie thereover, together with an inflammable pendant or'leader which F serves, when'ignited and consumed,'to release the'said levers.

magazines and which, in an continuation' of the throat' through portions `The tilm 17 is fed through the throats 6` and knlfe plate, showing the filmv enlarged transverse verticaly 1930. serial No. 460,440.

Fig. 5 is a horizontal section through the inflammable loop and tie and an electricalattachment for effecting an ignition and consumption of the 'loop or tie under certain conditions, the locking levers being shown engaged by the tie in full and 'dotted lines.

:sisA

Big. 6 is awiring diagram of the circuits involved.

A and B respectively designate the lower and upper magazines usually embodied 1n moving picture mechanism, the lower. mag` azine having guideU rollers 5 at the -baseo'f a throat' 6 i ipe with a slot 7 in the top 8. The upper a azine B has an inclined throat 9 dependin slot 10 in the bottom 10,

from a ai guide roller 1l being adjacent to said slot.

and the guide rollers 12 being disposed below the lower end of the throat 9, below which guide rollers is a further guide roller 13 in cooperative relation to a feed sprocket 14 driven by a motor as ausual in machines of this class. is adapted to contain a suitably mounted and actuated reel, as will be readily understood.

Rising above the slot 7 in the top 8 of the lower magazine A' is an upwardly extending exterior throat ll5, whic is practically a i below said slot.

15 and passes between upper guide rollers 18 edge partway across the width thereof, the

one wall 22 o f the slot Each of the magazines A and B and then across the open space between the lower and upper magazines for projection Fig.. 3 and having-a slot 21 exbeing beveled and formed as a cutting edge or knife. The same form of slide plate 2() is associated with the bottom of the upper magazine B as indicated at 23, the latter plate moving in grooved guides 24 and having a slot and knife edge in all respects similar to .the slot 21 and knife edge 22 as'shown in ig. 3. In other words, the plates 20 and `23 are duplicates in construction and are held within the respective magazines A and B.

g bottom 10 of the upper .thereof are precisely formed thereii 'The plates 20 and 23 are shiftable to close the the center thereof and operates to draw the late to which it is connected across the slot controlled by the said plate. At the ex tremity of each plate 2O or 23, opposite that` to which thespring 25 is secured, an opening 26 is formed in line with the point ofattachment of the said spring 25, the latter being secured to either the to azine A or the bottom o B, as clearly shown. v

The automatically operating mechanism controllin the release of either plate 20 or 23 is associated with each magazine, being arranged on the top 8 of the lower magazine A and dependinggfrom the bottom 10 of the upper magazine is reversed in'its application to the lower and upper magazines A and B but the elements the saine and a description of'onewill suilice for both and simi-lar reference characters will be applied to corresponding parts.

Projecting upwardly Vfrom the top 8 of the lower magazine A and downwardly from the magazine B is a fulcrum bracket 27, to the free end of which a catch lever or jaw 28 is fulcrumed between its ends, which lever has at its inner end a pro- 'ecting nose 29. To the outer end. of the catch ever or jaw 28 is pivotally connected a latch post 30, which projects through a suitable opening 31 in the adjacent side of the magazine and terminates in a rounded head 32 to engage the opening 26 of the plate 20 or 23. On the latch post 30 a spring 33 is mounted and secured at one end to said post and bears against the adjacent side of the magazine for the pur ose of assisting in quick disengagement o the latch post 30 from the opening 26 of either plate 20 or 23 when the mechanism is automatically operated to release either one or both of the said plates, as will be hereinafter explained. Also secured to the adjacent side of each magazine is a switch box or enclosure 34 'having switch 35, pivoted at one end to a contact or connector 36.and movableinto and outwardly from an opposing contact 37 in a manner similar to the Ordinar 'knife switch construction. Each knife switc lor blade 35 has the inner end of a lever or .j aw 38 pivotally connected thereto,. which lever or jaw is movable through an openingor slot 39 in the intermediate portion of the outer side of the switch box or casing 34. The outer free extremity of the lever or jaw 38 has a recess` or notch 40 'for the reception of the nose 29 'of the complemental lever or jaw 28. On

the upper magazine of the lower mag-` This automatic mechanism therein a knife one extremity to the latter lever or j aw and bearing at its opposite extremity against the side of the switch box or casing 34 adjacent theopening or slot 39 therein and tending to move the jaw t0 `close the switch 35. The lever or jaw 28 also has an auxiliary retractile spring 42 secured thereto and to an adjacent portion of the side of the magazine and operating to positively separate the lever or jaw 28 from the lever or jaw 38 when-the said jaws are released. Each of the contacts 36 and 37 of the respective switches has electrical wire connections 43 and 44 attached thereto and .also adapted to be connected to a magnetic switch c (shown diagrammatically in Fig. 6 which, when actuated, breaks the electric circuit to the motor and lighting means of the projector and vthus automatically stops the operation of the motor and extinguishesthe said lighting means.

Fusi the noses 29 of the levers 28 in the notches 40 of the levers 38 and which, when the film is ignited, may burn away to release said levers. Y

This fusible means comprises a loop 45 of celluloid or other analogous, quickly inflammable material, shown on an enlarged scale in Figs.'4 and 5, the said loo being of such dimensions as to fit over an hold together the engaged free ends of the levers or jaws 28 and 38. To each loop or sleeve 45 of inflammable material is secured one end of a pendant or projecting'strip 46 of the'same adjacency to the looped portionsl of t e film 17, the free end of the strip 46 associated with the upper magazine being opposite to the free end o the strip 46 associated with the lower magazine, as clearly shown by Fig l. Secured to each loop or sleeve 45 is a casing 47, preferably `of porcelain, having therein a high resistance wire or coil 48 with which a portion of the loop or sleeve 45 is in contact.

he terminals of the high resistance c oil 48 associated with the uppermagazine are connected by wires 49 and 50 to the terminals 36 and 37 of the switch 35 associated .with the lower magazine, and the high resistance coil 48 associatedV with the lower magazine are connected to the terminals 36 and 37 of the switch 35 associated with the upper magazine.

-ciated and also permit the associated switch 35 to close.' The closing of the switch 35 longitudinally in a direction4 le means are provided for holding ,materiah which terminates within ivniting f to close its associated slot thewires 51 and 52 or 53 and 54'to the high resistance coil 48 associated withthe other loop 45 to heat said coil and ignite and burn 4 away the latter loop and permit the sliding plate 20 or 23 associated with the latter loop i 7 or lO and also permit the switch 35 associated with the latter loop to close its associated slot.

The device is set for operation by shifting `the plates 20 or 23 against the` resistance of the springs connected thereto and effecting an engagement of the rounded heads 32 of the latch posts with the openings 26 in the ends of the said plates opposite the points of attachment thereto of the springs 25. At the same time the projecting noses 29 of the levers or jaws28 are caused to engage the notches of the levers or jaws 38, thus opening the switches 35 against the resistance of the springs 41. The engagement ofthe jaws or levers as justexplained and the projection of the rounded ends 32 of the latch posts 30 into the openings 26 of the plates 2O or 23 f will be effected against the resistance of the springs 33 and 42. Theloops or sleeves 45 of inflammable material are then applied over the engaged extremities of the levers or jaws 28 and 38 and the pendants orprojecting strips 46 arranged in close or igniting 4adjacency to loops of the film 17. In the event ofv firing of the film, which may be due to various causes, the part of the film ignited nearest the one pendant or strip 46 will cause the latter to ignite and consume and release the loop or sleeve and permit the extremities of the levers or jaws 28 and 38 thereby to fly apart, closing the associated switch 35 and the electric circuit to the magnetic switch to actuate said switch and effecting a stoppage of the e motor and an extinguishment of the lighting means of the projector.

tion ensues 1n connection with one set or ythe groups of levers or Vhen this operagroup of the levers or jaws, the remaining set r is also instantly operated through the medium of the electrical connections explained,

and as a consequence both plates 20 or 23 are released in view, of the fact'that the latch posts 30 have becomes disengaged therefrom and the springs 25 are free to act. Thus the slots 7 and 10 of the respective magazines are closed and simultaneously the portion o f the film exterior of the magazines yis severed from the remaining portions of the film within the magazin-es and on the reels of the latter are shielded against firing or ignition. The operation ofthe device is very simple and effective, and after the automatic operation as just described has ensued and the film 17 been rearranged for service, the safety attachments may be again reset as shown by Fig. 1. When jaws 28 and 38 are separated, the assume the positions shown by Fig. 2, and 1t will be seen from this figure that the plate 23, for example, has been shifted to close the slot 10 and throati9.v

lower magazine A. A

What'is claimed'as new 1s: J

l. In a moving picture machine embodyingA having a movable member and contacts and a jaw movably secured to said movable member and a jaw pivoted to the adjacent magazine side and extending toward the jaw of said switch, the latter jaw having means for locking the plate of its associated magazine open, fusible means embodying a high resistance coil surrounding the engaged extremities of said jaws and having a portion extending into igniting adjacency to a porvThe same operation will take place in connection with the tion of the film, and electrical connections between the contacts of each 'of said switches and the high resistance coil of one of said fusible means.

2, In a moving picture machine embodying film magazines having openings in Aad-l jacent sides for movement of the film therethrough from one magazine to the other, and knife plates automatically shiftable with relation to said openings, means associated with each plate for holding said plate in open position and operable when the film is ignited to permit said plate to shift to closing position, said means comprising an electrical switch having a movable member and contacts and a jaw movably secured to the switch member, a second jaw pivoted to the adjacent magazine side, said second jaw having means for locking the plate of its associated magazine in open position, fusible means including a high resistance heating coil surrounding the engaged extremities of said jaws and having a portion extending into igniting adjacency to a portion of thev film, and electrical connections between the contacts of each ofsaid switches and one of said fusible means, for simultaneously operating the similar mechanisms in connection with each magazine.

3. In a'motion picture machine embodying film magazines having openings in adjacent sides for movement of the film therethrough from one magazine to the other, and I knife plates automaticallyshiftable with relationv to said openings, automatic means for holding each of said plates in vopen position and permitting it to shift relatively toand to close its associated opening, said means comprising a switch having a movable memer and contacts and interfitting jaws re- Vspectively movably secuiedl to the tacts of each of said switches and the heating coil of one of said fusible means, and means actuated by said switches for breaking the electric circuits to the motor and to the lighting means of the projector.

4. In 'a moving picture machine embodying film magazines having .openings in adjacent sides for movement of the film thereazines having associated through from one magazine to the other, and knife plates automatically shiftable with relation to said openings, automatic fuse controlled meansassociated with each of said plates for normally holding said plates in open position and, when actuated, permitting them to shift into closing position, each of said means comprising a switch having a movable member and contacts and engagmg jaws respectively movably secured to the switch member and to the acent magazine side, the one jaw having means movably attached thereto for locking one of said plates infopen position, fusible means including a heating coil surrounding the temporarily engaged extremi a portion extending into igniting adjacency to a portion ,of the film, and electrical connections between each of saidjswitc'hes. and the heating coil of one of said fusible means, and means actuated bythe closing movement of said switches, for effecting a stoppage of operation of the motor for the film and an extinguishment of the lighting means for the projector.

5. In a moving picture machine embodying a pair of film magazines, each having a throat for the passage of vfilm therethrough to the other magazine and each of said magvtherewith a knife normally tending to move across its throat for severing the ilm, and a latch for holding,

said knife in retracted position land normally movable out of engagement with said knife, meansfor holding each latch in engagement with its' 'associatedknife and-siwith the latch holdmeans of the other magazine when the portion of the film external to'said magazines is ignited, said means comprising an electric switch normally movable into closed position, a fusible member directly engaging said latch and said switch to hold the latch in engagement with its associated knife and the switch in open position, an electrically heated element assoclated with each of said fusible means, and an electrical circuit beties of the jaws and having' tween each of said switches and the electricall heated element associated with the latch of t e other magazine for heating such electrically heated element when said switch is closed.

In testimony whereof I have hereunto seti4 m f hand.

5 MAURICE J. PECK; 

